Re: --sequential-read not sequential???

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On 20/02/2020 17:16, Graham Cobb wrote:
>>> the --sequential-read option lead dar to be suitable to read
>>> an archive from a pipe. If for some reason (corruption, dirty
>>> file, etc.) it need to skip back or forward it tries to do so.
>>> If that fails because the system refused, it continues as if it
>>> had not requested to skipped. The reason why skipping is needed
>>> should show with -vm option. This may lead to request an other
>>> slice.
> 
> I tried a run with -vm. It showed me many messages at the
> beginning, after fetching the first slice, and finishing with:
> 
> All layers have been created successfully The catalogue will be
> filled while sequentially reading the archive, preparing the data
> structure...
> 
> After that, it loaded the processed slices (2-9 in this case) and
> then loaded slices 1 and 2 again. But with no messages displayed
> about why it did that.

this is quite weird! I can't find the reason why dar would skip
backward to slices 1 and 2... I could not reproduce that with a simple
test... it may be dependent on your data (which would explain that -vm
did not show anything).

If you want to understand why, I would suggest adding -va (it will be
very verbose) and also add -p option to pause dar before each slice
change.
You should see in the last message each time dar pauses, what
triggered the slice change, at least what it currently does and this
is that which lead dar to skip back to slices 1.

> 
> I will try switching to dar_xform as you recommended.
> 
> 
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